> Anthropic apparently won't take responsibility for issues their own systems handling billing cause.

I think with every org, especially the big ones, trying to dodge responsibility (setting the intent of "customer support" to be annoying them enough for them to buzz off), the only recourse people have is to give them enough bad press where they wake up and do the refund, it's less than a rounding error for them.

I think Anthropic is hardly unique in that position and being able to chat with a human with any sort of power to actually make things right is becoming more and more rare. If any human eyes saw that, the correct thing to do would probably be passing the message up the chain like "Hey, this will have really bad optics if we don't do the right thing. Can you take like 5 minutes and hit the refund button while I draft up a nice message about it?"